$ git clone -n https://src.fedoraproject.org/rpms/golang-github-emersion-smtp.git /var/lib/mock/f39-build-1507803-35306/root/chroot_tmpdir/scmroot/golang-github-emersion-smtp
Cloning into '/var/lib/mock/f39-build-1507803-35306/root/chroot_tmpdir/scmroot/golang-github-emersion-smtp'...
$ git fetch origin 77ded805363bd62a4e0f8c7afa098ea4328911d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-emersion-smtp
 * [new ref]         77ded805363bd62a4e0f8c7afa098ea4328911d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77ded80 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild