$ git clone -n https://src.fedoraproject.org/rpms/golang-github-c4milo-unpackit.git /var/lib/mock/f39-build-1507785-35304/root/chroot_tmpdir/scmroot/golang-github-c4milo-unpackit
Cloning into '/var/lib/mock/f39-build-1507785-35304/root/chroot_tmpdir/scmroot/golang-github-c4milo-unpackit'...
$ git fetch origin 26b7c1c737defb14ba6bd70d437a3823019a0514:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-c4milo-unpackit
 * [new ref]         26b7c1c737defb14ba6bd70d437a3823019a0514 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26b7c1c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild