$ git clone -n https://src.fedoraproject.org/rpms/rust-serial_test1.git /var/lib/mock/f40-build-2039569-48279/root/chroot_tmpdir/scmroot/rust-serial_test1
Cloning into '/var/lib/mock/f40-build-2039569-48279/root/chroot_tmpdir/scmroot/rust-serial_test1'...
$ git fetch origin 870371dcf50d0d5e0d7c03fa8959ee85b04dfd96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serial_test1
 * [new ref]         870371dcf50d0d5e0d7c03fa8959ee85b04dfd96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 870371d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild