$ git clone -n https://src.fedoraproject.org/rpms/xfce4-taskmanager.git /var/lib/mock/f45-build-38827-728/root/chroot_tmpdir/scmroot/xfce4-taskmanager
Cloning into '/var/lib/mock/f45-build-38827-728/root/chroot_tmpdir/scmroot/xfce4-taskmanager'...
$ git fetch origin aa2965c2c854d276139f7fd585f081cfd00f9b69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-taskmanager
 * [new ref]         aa2965c2c854d276139f7fd585f081cfd00f9b69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa2965c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild