$ git clone -n https://src.fedoraproject.org/rpms/chez-scheme.git /var/lib/mock/f45-build-5517-340/root/chroot_tmpdir/scmroot/chez-scheme
Cloning into '/var/lib/mock/f45-build-5517-340/root/chroot_tmpdir/scmroot/chez-scheme'...
$ git fetch origin f5464781eb23f30d66d5a659c1ec37e65e6bd408:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chez-scheme
 * [new ref]         f5464781eb23f30d66d5a659c1ec37e65e6bd408 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f546478 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild