$ git clone -n https://src.fedoraproject.org/rpms/icestorm.git /var/lib/mock/f39-build-1468169-33761/root/chroot_tmpdir/scmroot/icestorm
Cloning into '/var/lib/mock/f39-build-1468169-33761/root/chroot_tmpdir/scmroot/icestorm'...
$ git fetch origin 8c4f0fe155fea44367ffe695198a07d2ad0b9d1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icestorm
 * [new ref]         8c4f0fe155fea44367ffe695198a07d2ad0b9d1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c4f0fe Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild